<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <script>
        var a=011;
        var b=0x11;
        console.log(a);
        console.log(b);
        var c=false;
        var d=1.123;
        var e='abc';
        console.log(typeof c);
        console.log(typeof d);
        console.log(typeof e);

    </script>
</body>
</html>